J. Phys. IV France 7 (1997) C2-439-C2-440
Magnetic Circular X-Ray Dichroism at the Ce LII,III Edges in Ferromagnetic Iron Based Intei metallicO. Isnard1, S. Miraglia1, Ch. Giorgetti2, F. Baudelet2, E. Dartyge2, G. Krill2 and D. Fruchart1
1 Laboratoire de Cristallographie, CNRS, BP. 166X, Université Joseph Fourier, 38042 Grenoble France
2 Laboratoire LURE, bâtiment 209d, Université Paris Sud, 91405 Orsay, France
Measurements of magnetic circular dichroism (MCXD) at the Ce LII and LIII edges have been performed from CeFe11Ti and CeFe5.5Ga6.5 both ferromagnetic compounds. The recorded MCXD signal is presented and compared to earlier reported results  on other intermetallic. A significant magnetic moment of 5d origin has been observed, the magnitude of which being very sensitive to the change in the Ce environment. An estimation of the 5d magnetic moment is derived from the measurements. The observed MCXD signal is discussed at the light of macroscopic magnetic properties that are reminded. A magnetic EXAFS of large amplitude is observed on all the studied compound. The comparison of the MCXD spectra at the LII and LIII edges shows that the signal is typical of a mixed valence state of Ce.
© EDP Sciences 1997